From: Jerome Glisse <j.glisse@gmail.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: akpm@linux-foundation.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>, "H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Johannes Weiner <jweiner@redhat.com>,
Larry Woodman <lwoodman@redhat.com>,
Rik van Riel <riel@redhat.com>, Dave Airlie <airlied@redhat.com>,
Brendan Conoboy <blc@redhat.com>,
Joe Donohue <jdonohue@redhat.com>,
Duncan Poole <dpoole@nvidia.com>,
Sherry Cheung <SCheung@nvidia.com>,
Subhash Gutti <sgutti@nvidia.com>,
John Hubbard <jhubbard@nvidia.com>,
Mark Hairgrove <mhairgrove@nvidia.com>,
Lucien Dunning <ldunning@nvidia.com>,
Cameron Buschardt <cabuschardt@nvidia.com>,
Arvind Gopalakrishnan <arvindg@nvidia.com>,
Shachar Raindel <raindel@mellanox.com>,
Liran Liss <liranl@mellanox.com>,
Roland Dreier <roland@purestorage.com>,
Ben Sander <ben.sander@amd.com>,
Greg Stoner <Greg.Stoner@amd.com>,
John Bridgman <John.Bridgman@amd.com>,
Michael Mantor <Michael.Mantor@amd.com>,
Paul Blinzer <Paul.Blinzer@amd.com>,
Laurent Morichetti <Laurent.Morichetti@amd.com>,
Alexander Deucher <Alexander.Deucher@amd.com>,
Oded Gabbay <Oded.Gabbay@amd.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/8] mmu_notifier: pass through vma to invalidate_range and invalidate_page v2
Date: Wed, 9 Jul 2014 12:55:10 -0400 [thread overview]
Message-ID: <20140709165448.GA4249@gmail.com> (raw)
In-Reply-To: <20140709164131.GQ1958@8bytes.org>
On Wed, Jul 09, 2014 at 06:41:31PM +0200, Joerg Roedel wrote:
> On Tue, Jul 08, 2014 at 06:00:01PM -0400, j.glisse@gmail.com wrote:
> > New user of the mmu_notifier interface need to lookup vma in order to
> > perform the invalidation operation. Instead of redoing a vma lookup
> > inside the callback just pass through the vma from the call site where
> > it is already available.
>
> Why do you need to lookup the vma during the invalidation operation?
> Given that invalidate_range_start/end can be expensive to implement on
> the call-back side those calls should happen less instead of more
> frequently.
>
To do different thing if vma is file backed and depending on the block
device the file is in.
Cheers,
Jerome
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next prev parent reply other threads:[~2014-07-09 16:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1404856801-11702-1-git-send-email-j.glisse@gmail.com>
2014-07-08 23:50 ` mm: Various preparatory patches for hmm and kfd Jerome Glisse
[not found] ` <1404856801-11702-3-git-send-email-j.glisse@gmail.com>
2014-07-08 23:51 ` [PATCH 2/8] mm: differentiate unmap for vmscan from other unmap Jerome Glisse
2014-07-09 16:24 ` Joerg Roedel
2014-07-09 17:24 ` Jerome Glisse
[not found] ` <1404856801-11702-5-git-send-email-j.glisse@gmail.com>
2014-07-08 23:52 ` [PATCH 4/8] mmu_notifier: pass through vma to invalidate_range and invalidate_page v2 Jerome Glisse
[not found] ` <20140709164131.GQ1958@8bytes.org>
2014-07-09 16:55 ` Jerome Glisse [this message]
[not found] ` <1404856801-11702-2-git-send-email-j.glisse@gmail.com>
2014-07-08 23:51 ` [PATCH 1/8] mmput: use notifier chain to call subsystem exit handler Jerome Glisse
2014-07-09 16:21 ` Joerg Roedel
2014-07-09 16:30 ` Gabbay, Oded
2014-07-09 17:33 ` Jerome Glisse
[not found] ` <1404856801-11702-4-git-send-email-j.glisse@gmail.com>
2014-07-08 23:52 ` [PATCH 3/8] mmu_notifier: add event information to address invalidation v3 Jerome Glisse
2014-07-09 16:32 ` Joerg Roedel
2014-07-09 17:16 ` Jerome Glisse
[not found] ` <20140709164637.GR1958@8bytes.org>
2014-07-09 17:26 ` mm: Various preparatory patches for hmm and kfd Jerome Glisse
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